Solve the inequality 2(3x - 4) ≥ 9x - 10

Answer:

1/36

Step-by-step explanation:

In two six-sided dice, there is only one way of getting a 12. That is with 2 6s.

There are a total of 36 possibilities (6^2). 1/36

Hope this helps!

Answer:

Step-by-step explanation:

The given function is f(x) = 9x + 7.  To find the inverse function:

1.  Replace "f(x)  = " with "y = ":  y = 9x + 7

2.  Interchange x and y:  x = 9y + 7        

                                                                          x - 7

3.  Solve this result for y:  9y = x - 7, or y = ---------------

                                                                              9

This is the same result as given answer B.

The 90% confidence interval estimate is (36.93, 62.39) minutes. The confidence interval does not indicate whether the treatment is effective. Therefore, the correct option is D.

1. Identify the sample size (n), sample standard deviation (s), and degrees of freedom (df):

n = 29, s = 44.9 min, and df = n - 1 = 28.
2. Look up the chi-square values for a 90% confidence interval:

For df = 28, the chi-square values are 15.51 (lower) and 42.98 (upper).

3. Calculate the confidence interval estimate:

Lower limit = √((n - 1) * s^2 / upper chi-square value) = √(28 * (44.9)^2 / 42.98) = 36.93 min

Upper limit = √((n - 1) * s^2 / lower chi-square value) = √(28 * (44.9)^2 / 15.51) = 62.39 min

The 90% confidence interval estimate for the standard deviation of wake times is (36.93, 62.39) minutes.

As for the effectiveness of the treatment, the confidence interval does not indicate whether the treatment is effective or not, because the interval is about the standard deviation of the wake times, not the mean wake times or the success of the treatment. Therefore, the answer is D. No, the confidence interval does not indicate whether the treatment is effective.

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Answer: Part A: 3 (yards per second) Part B: 20 (seconds)

Step-by-step explanation:

See answer above :)

Answer:

How many unit are they

Step-by-step explanation:

Answer:

3 tens, 2 ones, 1 tenth, 5 hundredths

Step-by-step explanation:

just look at the place and count like tens, hundred ,thousand  

Answer:

$35

Step-by-step explanation:

10% + 20% = 30%

You spent 30% of the $50 clothes and games.

You spent the rest on books.

100% - 30% = 70%

You spend 70% on books.

70% of $50 = 0.70 × $50 = $35

Answer: $35

Answer:

35

Step-by-step explanation:

x/50=70/10 cross multiply and then divide 3500 by 100 which equals 35 which would be $35 which is 70% of $50

Answer:

Thx u

Step-by-step explanation:

that's not good oof

:3

:)

:0

:>

Answer:

A=False

B=True

C=True

Step-by-step explanation:

Answer:

4900

Step-by-step explanation:

multiply all those numbers together

2x2x5x5x7x7 = 4900

Answer:

Its getting divided by 4 each time. Hope This Helps!

Step-by-step explanation:

Answer:

  D.  p + q = 7

Step-by-step explanation:

The slope of AB is ...

  mAB = (y2 -y1)/(x2 -x1) = (1 -4)/(6 -p) = -3/(6 -p)

The slope of BC is ...

  mBC = (q -1)/(9 -6) = (q -1)/3

We want the product of these slopes to be -1:

  mAB·mBC = -1 = (-3/(6 -p))·((q -1)/3)

  -(q-1)/(6 -p) = -1 . . . . cancel factors of 3

  q -1 = 6 -p . . . . . multiply by -(6 -p)

  q + p = 7 . . . . . matches choice D

Answer:

C p+q=7

Step-by-step explanation:

I did it on plato and it was right

The value of measure m FE is,

⇒ m FE = 50°

And, The value of measure m DBF is,

⇒ m DBF = 130°

The circle is a closed two dimensional figure , in which the set of all points is equidistance from the center.

Given that;

The figure of circle is shown.

Now, By figure, We have;

⇒ m BC + m CD = 90°

⇒ m BC + 40° = 90°

⇒ m BC = 50°

Hence, By definition of vertically opposite angle, we get;

⇒ m FE = 50°

And, We get;

⇒ m DBF = 360 - (180 + 50)

⇒ m DBF = 360 - 230

⇒ m DBF = 130°

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Answer:

The answer is D: -y^4

Step-by-step explanation:

(-1/y^-4) = -1(y^4)/1 = -y^4

The taxi driver charges an initial fare of $3.00 plus $0.40 for each 1/5 of a mile driven. If the total charge for a ride is $27.00, the distance traveled, in miles is 9.

  The data given in the question is, The taxi driver charges an initial fare of $3.00 plus $0.40 for each 1/5 of a mile driven. The total charge for a ride is $27.00.

   Let's calculate the distance traveled:

                  Let d be the distance traveled. The given data in the problem is in dollars and cents. Therefore, let's first change it to the same units (cents). We know that 1 dollar is equal to 100 cents. Thus $27.00 is equal to 27 * 100 cents.

    Therefore, $27.00 is equal to 2700 cents.

     Now, we know that the driver charges $3.00 as an initial fare.

                    So, he charged 300 cents. Therefore, the remaining amount of money he charged for the distance is (2700 - 300) cents.

      Hence, he charged 2400 cents for the distance traveled. The driver charges $0.40 for each 1/5 of a mile. That is 40 cents for each 1.2 km.

     Therefore, he charges 200 cents for each 1.2 km of distance traveled.

      Hence, he charges (2400/200) * 1.2 km of distance traveled.

       Therefore, the distance traveled is 14.4 km or 9 miles. Accordingly, the distance traveled, in miles, is 9.

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15/19 + 14/19 = 29/19

Step-by-step explanation:

Add the number of balls in the basket together.

Subtract the number of white balls from the sample space ( the total amount of balls) your answer is written over the sample space and the same process is done for the green ball

When calculating a chi-square, the observed frequencies are based on the information from our sample data.

When calculating a chi-square, the observed frequencies are based on the information from our sample data. The observed frequency (f_obs) is the frequency that a certain event or category actually appears in our data.

We use observed frequencies to test if there is any significant difference between the observed and expected frequencies.

Chi-square is a test used to examine the association between two variables. It compares the observed frequencies to the expected frequencies to test the null hypothesis that there is no association between the variables.

The formula for calculating chi-square is:χ2=Σ(f_obs−f_exp)2f_exp , where χ2 is the chi-square statistic, f_obs is the observed frequency, f_exp is the expected frequency, and Σ is the sum of all categories or events.

The chi-square test is used in many fields, including biology, psychology, sociology, and marketing. The test helps to determine if two categorical variables are independent or not.

The chi-square test can also be used to compare observed frequencies to expected frequencies in a contingency table. It can be used to determine if there is a significant difference between the expected and observed frequencies.

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Answer:

20

Step-by-step explanation:

(16)2+(12)2=

 c2\,\,c^{2}c2

Use the Pythagorean Theorem.

256+144=256+144=256+144=

 c2\,\,c^{2}c2

Simplify.

400=400=400=

 c2\,\,c^{2}c2

Simplify.

±400=\pm\sqrt{400}=±400

​=

 c2\,\,\sqrt{c^{2}}c2

​

Square root both sides.

20=20=20=

 c\,\,cc

Simplify. Ignore negative root, as length must be positive.

Answer:

112 degrees

Step-by-step explanation:

This is a quadrilateral, meaning 4 sides. The sum of the angles of a quadrilateral is 360 degrees. You are given the right angle, or 90 degrees, and the 46 degree angle at the bottom. Since the two lines on either side of the 46 degree angle represent parallelism, angles 1 and 2 are the same.

360 - (90+46) = 224.

224 / 2 = 112.

Answer:

\(m∠1 = 112\)

Step-by-step explanation:

\(m∠1 = m∠2\)

\(m∠1 + m∠2 + 90 + 46 = 360\)

\(m∠1 +m ∠2 + 136 = 360\)

\(m∠1 + m∠2 = 360 - 136\)

\(m∠1 + m∠2 = 224\)

\(m∠1 = \frac{224}{2} \)

\(m∠1 = 112\)

\(m∠2 = \frac{224}{2} \)

\(m∠2 =112\)

Answer: 81,000

Step-by-step explanation:

We can solve this by using the formula given.

If f(1)=1000x3^1, then 1,000x3=3,000

If f(2)=1000x3^2, then 3^2=9 and 1000x9=9000,

and so on,

Now, f(4) will equal 1000x3^4, and 3^4 is 3x3x3x3, which is 9x9 or 9^2, which would be equal to 81, and 81x1000=81,000

To complete the table of values for the exponential function f(x) = 1000*3^x, we can evaluate the function for x = 0, 1, 2, 3, and 4, since we are interested in the number of bacteria on the phone after 4 hours.

x f(x)

0 1000

1 3000

2 9000

3 27,000

4 81,000

Therefore, after 4 hours, there will be 81,000 bacteria on the surface of the phone, assuming the number of bacteria triples every hour and can be described by the exponential function f(x) = 1000*3^x.

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The maximum profit is achieved when approximately 312.5 units of lab equipment are sold.

The revenue function R(x) represents the amount of money the company earns from selling x units of lab equipment. It is given by the equation:

R(x) = -0.32x^2 + 270x

The costs function C(x) represents the expenses incurred by the company for producing and selling x units of lab equipment. It is given by the equation:

C(x) = 70x + 52

To determine the company's profit, we subtract the costs from the revenue:

Profit = Revenue - Costs

P(x) = R(x) - C(x)

Substituting the given revenue and costs functions:

P(x) = (\(-0.32x^2 + 270x)\) - (70x + 52)

Simplifying the equation:

P(x) = -0.32x^2 + 270x - 70x - 52

P(x) = -\(0.32x^2\)+ 200x - 52

The profit function P(x) represents the amount of money the company makes from selling x units of lab equipment after deducting the costs. It is a quadratic function with a negative coefficient for the x^2 term, indicating a downward-opening parabola. The vertex of the parabola represents the maximum profit the company can achieve.

To find the maximum profit and the corresponding number of units sold, we can use the vertex formula:

x = -b / (2a)

For the profit function P(x) = -\(0.32x^2 + 200x\)- 52, a = -0.32 and b = 200.

x = -200 / (2 * -0.32)

x = 312.5

Therefore, the maximum profit is achieved when approximately 312.5 units of lab equipment are sold.

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Given that $OF = 9$ and $OF' = 12,$ where $F$ and $F'$ are the foci of the ellipse, we can determine the lengths of the major and minor axes.

In an ellipse, the sum of the distances from any point on the ellipse to the two foci is constant. This property is expressed by the equation:

$$PF + PF' = 2a,$$

where $P$ is any point on the ellipse and $a$ is the semi-major axis. In our case, $P = O,$ and since $OF = 9$ and $OF' = 12,$ we have:

$$9 + 12 = 2a,$$

$$21 = 2a.$$

Therefore, the semi-major axis $a$ is equal to $\frac{21}{2} = 10.5.$

The distance between the center of the ellipse and each focus is given by $c,$ where $c$ is related to $a$ and the semi-minor axis $b$ by the equation:

$$c = \sqrt{a^2 - b^2}.$$

We can solve for $b$ using the distance to one focus:

$$c = \sqrt{a^2 - b^2},$$

$$c^2 = a^2 - b^2,$$

$$b^2 = a^2 - c^2,$$

$$b = \sqrt{a^2 - c^2}.$$

Substituting the known values:

$$b = \sqrt{10.5^2 - 9^2},$$

$$b = \sqrt{110.25 - 81},$$

$$b = \sqrt{29.25},$$

$$b \approx 5.408.$$

Therefore, the semi-minor axis $b$ is approximately $5.408.$

Finally, we can determine the lengths of the major and minor axes:

The major axis $\overline{AB}$ is twice the semi-major axis, so $\overline{AB} = 2a = 2(10.5) = 21.$

The minor axis $\overline{CD}$ is twice the semi-minor axis, so $\overline{CD} = 2b = 2(5.408) \approx 10.816.$

Therefore, the major axis $\overline{AB}$ is $21$ units long, and the minor axis $\overline{CD}$ is approximately $10.816$ units long.

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Yes, the polynomial p(z)=anz^n an-1z^n-1 .. a0 is written in factored form as p(z)=an(z-z1)^d1 (z-z2)^d2 …(z-zr)^dr.

To show that if the polynomial p(z) is written in factored form as\(p(z) = an(z-z1)^d1 (z-z2)^d2 ...(z-zr)^dr\), then the coefficients satisfy the following relations:

The degree of the polynomial p(z) is n, which means that the sum of the exponents of the factors in the factored form is equal to n:

\(d1 + d2 + ... + dr = n\)

The coefficient of the highest degree term in p(z) is an, which means that:

\(an = ad1d2*...*dr\)

To prove these relations, we start by expanding the factored form of p(z) using the distributive property:

\(p(z) = an(z-z1)^d1 (z-z2)^d2 ...(z-zr)^dr\)

\(= an*(z^d1 - z1^d1)(z^d2 - z2^d2)...*(z^dr - zr^dr)\)

The degree of p(z) is the highest power of z in this expression, obtained by adding up the highest exponents of z in each term.

Since each factor \((z - zi)\)has a maximum exponent of di, the highest power of z in\(p(z) is d1 + d2 + ... + dr.\)

\(n = d1 + d2 + ... + dr\)

The coefficient of the highest degree term in the expanded form of p(z) is obtained by multiplying the highest degree terms in each factor.

we compare it with the coefficient of the highest degree term in the original polynomial p(z).

\(an*(z1^d1)(z2^d2)...*(zr^dr)\)

On the other hand, the coefficient of the highest degree term in p(z) is the coefficient of \(z^n,\) which is an. Therefore, we have:

\(an = an*(z1^d1)(z2^d2)...*(zr^dr)\)

Dividing both sides by the product of the z-terms, we get:

\(1 = (z1^d1)(z2^d2)...*(zr^dr)\)

Multiplying both sides by an, we get:

\(an = ad1d2*...*dr\)

This proves that the coefficients of the polynomial p(z) satisfy the relations stated above.

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Answer:

80π feet

Step-by-step explanation:

The question is asking us for the circumference of a circle with diameter 80 ft.

The formula for the circumference of a circle is πd. Therefore, the circumference is π * 80 = 80π ft!

if this helps you, it would help me a lot if you could mark this as brainliest :)

Answer:

The circumference of a circle is equal to the diameter times pi, which is approximately 3.14. Therefore, the distance of one complete loop on a circular path with a diameter of 80 feet is approximately 80 * 3.14 = 251.2 feet.

Step-by-step explanation:

Answer:

Yes on one picture it says -40 and on the other one it says -4 so there is a differemce.

Step-by-step explanation:

Scenario 2 Magnifi Co. produces a high-end amplifier for musical aficionados. Historically, only 85% of the 200 amplifiers produced per month on average have met the company's demanding standards for quality control. Suppose a random sample of 50 amplifiers is taken from a month's production..

What is the probability that less than 40 of the amplifiers will meet the company's quality standards? b) What is the probability that between 40 and 45 inclusive of the amplifiers will meet the company's quality standards? c) What is the probability that more than 45 of the amplifiers will meet the company's quality standards? a) In order to solve for the probability that less than 40 amplifiers will meet the company's quality standards, we can use the binomial distribution formula: P(X < 40) = Σi=0^39 C(50, i) (0.85)i(1-0.85)50-i

This can be solved using a computer, calculator, or by using a binomial probability table. Using a binomial table, we can find that P(X < 40) = 0.024. Therefore, there is a 0.024 probability that less than 40 amplifiers will meet the company's quality standards. b) To solve for the probability that between 40 and 45 amplifiers inclusive will meet the company's quality standards, we can use the binomial distribution formula again. We need to solve for P(40 ≤ X ≤ 45): P(40 ≤ X ≤ 45) = Σi=40^45 C(50, i) (0.85)i(1-0.85)50-i This can also be solved using a computer, calculator, or binomial table. Using a binomial table, we can find that P(40 ≤ X ≤ 45) = 0.435. Therefore, there is a 0.435 probability that between 40 and 45 amplifiers inclusive will meet the company's quality standards. c) To solve for the probability that more than 45 amplifiers will meet the company's quality standards, we can use the binomial distribution formula one more time. We need to solve for P(X > 45): P(X > 45) = Σi=46^50 C(50, i) (0.85)i(1-0.85)50-i Once again, this can be solved using a computer, calculator, or binomial table. Using a binomial table, we can find that P(X > 45) = 0.056. Therefore, there is a 0.056 probability that more than 45 amplifiers will meet the company's quality standards.Overall, it can be concluded that the probability that less than 40 amplifiers will meet the company's quality standards is low, the probability that between 40 and 45 amplifiers inclusive will meet the company's quality standards is relatively high, and the probability that more than 45 amplifiers will meet the company's quality standards is relatively low.

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Answer:

B- hope this helps:)

Step-by-step explanation:

The total cost to paint 864.5 square feet of wall is $2,048.87.

It is given that the cost to paint one square foot of wall is $2.37.

We are asked to find the total cost to paint 864.5 square feet of wall.

If we have a number that has a decimal point then we have two parts.

The whole number part and the fractional part.

After the decimal point, we will count the place value as tenths, hundredths, thousandths, and so on.

You can also see the given figure below.

We know that,

One square foot = $2.37.

Remember that Feet is the plural form of the foot.

We can write,

864.5 square feet = 864.5 x  one square foot

Because in 864.5 square feet we have 864.5 one square foot.

And since one square foot cost $2.37.

864.5 square feet will cost 864.5 x 2.37 dollars.

Now,

864.5 x 2.37 = $2048.865.

Rounding to the nearest hundredth.

6 is in the hundredth place so we will round 86 to 87 since the number in the thousandth place is greater than 4.

Thus the total cost to paint a wall of 864.5 square feet is $2,048.87.

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The statement "If f(x) is continuous on the closed interval [a, b], then f(x) must have an absolute maximum and an absolute minimum on the interval" is not true if we replace the closed interval [a, b] with the open interval (a, b).

Counterexample: Let f(x) = 1/x on the open interval (0, 1). Since 1/x is continuous on (0, 1), we can apply the Extreme Value Theorem to conclude that f(x) must have an absolute maximum and an absolute minimum on (0, 1).

However, we can see that f(x) does not have an absolute maximum on (0, 1) since as x approaches 0, f(x) approaches positive infinity.

The Extreme Value Theorem states that if a function is continuous on a closed interval, then it must have an absolute maximum and an absolute minimum on that interval.

However, if the interval is not closed, then the theorem does not necessarily hold. The counterexample above shows that the function 1/x does not have an absolute maximum on the open interval (0, 1), even though it is continuous on that interval. Therefore, the statement is not true if we replace the closed interval [a, b] with the open interval (a, b).

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(a) If a particle moves along a straight line, the acceleration vector is parallel to the tangent vector.

It has a magnitude of zero.

(b) If a particle moves with constant speed along a curve, the acceleration vector is parallel to the unit normal vector.

It has a magnitude of zero since the velocity vector has a constant magnitude.

If a particle moves along a straight line, the acceleration vector is parallel to the tangent vector.

The acceleration vector has zero magnitude in this case and is always directed along the straight line.

A particle's acceleration vector is determined by the motion of the particle along a curve.

When a particle moves along a curve at a constant velocity, the acceleration vector is orthogonal to the velocity vector and has a magnitude of zero.

The particle moves in a straight line when its acceleration vector has zero magnitude, as in the first question about a particle moving along a straight line.

(a) If a particle moves along a straight line, the acceleration vector is parallel to the tangent vector.

It has a magnitude of zero.

(b) If a particle moves with constant speed along a curve, the acceleration vector is parallel to the unit normal vector.

It has a magnitude of zero since the velocity vector has a constant magnitude.

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25% is the larger circle area is gray.

Area of a Circle: The area of a circle is pi times the radius squared.

To calculate the area of the circle we have the formula:

A = π r²-----(1)

where

A=area

r=radius.

First, we have to analyze the given data, the large circle center o passes through d, so

Gray circle area=π*(radius)^2----(2)

The radius of the smaller circle = OD/2 substitute in (2)

Gray circle area=π*(OD/2)^2

Gray circle area=π*OD^2/4

Larger circle area=π*(radius)2    

radius of the larger circle = OD

larger circle area=π*OD^2  

To know the percentage of a large circle we have a small formula:

gray circle area/large circle area--------(3)

=π*OD^2/4/π*OD^2  

=π*OD^2/4*1/π*OD^2=1/4

=25/100

=25%

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